Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY Can Vaping Cause Lung Cancer? Here's What We Know. Sitting somewhere when a cloud of cotton candy vapor washes over you? If you can smell the sweet scent of a vape, that's not a great sign. Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Can you get second hand smoke from a vape